Why does my array -count method return zero after adding an element?

Question

I have class like the following

@interface Node : NSObject {

NSString* description;
NSString* ae;
NSString* ip;
NSString*  port;
}

@property ( nonatomic , retain ) NSString* description;
@property ( nonatomic , retain ) NSString* ae;
@property ( nonatomic , retain ) NSString* ip;
@property ( nonatomic , retain ) NSString* port;

@end

#import "Node.h"

@implementation Node

@synthesize description,ae,ip,port;

@end

I want to create nsmutablearray of it So I do the following

NSMutableArray* nodesArray ;
nodesArray = [[NSMutableArray alloc] init];

Node * insertedNode =[[Node alloc]init] ;
insertedNode.description =@"test";
insertedNode.ae =@"test" ;
insertedNode.ip =@"test";
insertedNode.port =@"test";

[nodesArray addObject: insertedNode] ;

[insertedNode release];

then I print the count using

NSLog(@"%d",[nodesArray count] ) ;

but it always always return 0

any suggestion to solve that

Best regards

Please fix your indentation. Please fix your title to describe the actual problem you're actually having. — S.Lott
– S.Lott, Commented Jun 2, 2011 at 11:37
@Abizern: That doesn't help @AMH learn how to write a good question, does it? — S.Lott
– S.Lott, Commented Jun 2, 2011 at 11:38
my problem is that I want to create nsmutablearray of class object but no insertion done — AMH
– AMH, Commented Jun 2, 2011 at 11:40
@AMH: Change the NSLog to NSLog(@"%@", nodesArray) and tell us what you get. — JeremyP
– JeremyP, Commented Jun 2, 2011 at 12:41

Ben Mosher · Accepted Answer · 2011-06-02 12:12:54Z

1

Perhaps NodesArray is failing to initialize? You could try testing to see if it is nil after you initialize it. (at [[NSMutableArray alloc] init])

Adding an object to a nil NSMutableArray * would fail silently, and [nil count] will always return zero.

(No idea why it would fail to initialize, but I can't imagine anything else causing the behavior you're describing.)

answered Jun 2, 2011 at 12:12

Ben Mosher

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